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A Comparative Study of Different Feeding Schemes on the Performance of Shorted-Loop Antenna for Wireless Applications


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DOI: https://doi.org/10.15866/iremos.v16i3.23440

Abstract


The utilization of loop antenna structures for 5G smartphone applications, particularly for sub-6 GHz frequency bands, is a major point of focus in antenna design. Due to its superior resistance to detuning, the loop antenna is a promising option for metal-rimmed smartphones. This study aims to compare the performance of shorted-loop antennas utilizing different feeding techniques, such as direct and indirect feeds. The loop antenna is specifically designed for 3.5 GHz, a sub-6 GHz 5G band, and is evaluated based on factors such as antenna size, impedance bandwidth, radiation efficiency, and mutual coupling levels. The findings indicate that indirect feeds, such as the edge-coupled capacitive feed, offer the best performance with a broad impedance bandwidth, exceptional resonance, high radiation efficiency, and minimal mutual coupling.
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Keywords


Shorted-Loop Antennas; Sub-6 GHz Antennas; Comparative Study; Massive MIMO; 5G Antennas

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References


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